EP0927011B1 - Zwischenwirbel-implantat - Google Patents
Zwischenwirbel-implantat Download PDFInfo
- Publication number
- EP0927011B1 EP0927011B1 EP96927498A EP96927498A EP0927011B1 EP 0927011 B1 EP0927011 B1 EP 0927011B1 EP 96927498 A EP96927498 A EP 96927498A EP 96927498 A EP96927498 A EP 96927498A EP 0927011 B1 EP0927011 B1 EP 0927011B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- implant
- ceramic material
- intervertebral
- top surface
- intervertebral implant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
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- A61F2/4465—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Public Health (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Neurology (AREA)
- Veterinary Medicine (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Dermatology (AREA)
- Medicinal Chemistry (AREA)
- Epidemiology (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Prostheses (AREA)
Description
Eine perspektivische Darstellung des erfindungsgemässen-Implantats.
Der Fremdphasenanteil des keramischen Materials beträgt 1,5 Gew.-%. Die Druckfestigkeit des keramischen Werkstoffs beträgt 500 MPa.
Die Deckfläche 1 und die Grundfläche 2 sind zueinander keilförmig zulaufend angeordnet und sind leicht nach aussen konvex gewölbt.
Claims (21)
- Zwischenwirbel-Implantat prismatischer oder zylindrischer Gestalt mit der Längsachse (3), dessen Deckfläche (1) und Grundfläche (2) für den Knochenkontakt zu den Deckplatten zweier Wirbelkörper geeignet sind, wobei das Zwischenwirbel-Implantat im wesentlichen aus einem porösen, keramischen Werkstoff besteht, der eine Porosität von höchstens 30 Vol.-% aufweist und dessen Poren mit Luft gefüllt sind und der Mantel (6) des Zwischenwirbel-Implantats mit einer dreidimensionalen Strukturierung (9) versehen ist,
dadurch gekennzeichnet, dass die
dreidimensionale Strukturierung (9) eine Tiefe von 0,5 - 1,0 mm aufweist. - Implantat nach Anspruch 1, dadurch gekennzeichnet, dass der keramische Werkstoff röntgentransparent ist.
- Implantat nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Deckfläche (1) und/oder die Grundfläche (2) nicht planar ausgebildet ist.
- Implantat nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Deckfläche (1) und/oder die Grundfläche (2) mit quer zur Längsachse (3) verlaufenden Rillen (4) und/oder Erhöhungen (5) versehen ist.
- Implantat nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Mantel (6) des Zwischenwirbel-Implantats mit einer oder mehreren Perforationen (7) versehen ist.
- Implantat nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Porosität des keramischen Werkstoffs höchstens 9 Vol.-% beträgt.
- Implantat nach Anspruch 6, dadurch gekennzeichnet, dass die Porosität des keramischen Werkstoffs höchstens 5 Vol.-% beträgt.
- Implantat nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Wandstärke des Zwischenwirbel-Implantats mindestens 4 mm beträgt.
- Implantat nach Anspruch 8, dadurch gekennzeichnet, dass die Wandstärke des Zwischenwirbel-Implantats mindestens 6 mm beträgt.
- Implantat nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Dichte des keramischen Werkstoffs grösser als 2,8 g/cm3 ist.
- Implantat nach Anspruch 10, dadurch gekennzeichnet, dass die Dichte des keramischen Werkstoffs grösser als 3,1 g/cm3 ist.
- Implantat nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass das Zwischenwirbel-Implantat als hohler Kreiszylinder mit der Längsachse (3) ausgebildet ist.
- Implantat nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Deckfläche (1) und die Grundfläche (2) parallel zueinander angeordnet sind.
- Implantat nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Deckfläche (1) und die Grundfläche (2) keilförmig zueinander zulaufend angeordnet sind.
- Implantat nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die Deckfläche (1) und/oder die Grundfläche (2) nach aussen konvex gewölbt ist.
- Implantat nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass das keramische Material polykristallin ist.
- Implantat nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass das keramische Material einen Fremdphasenanteil von kleiner als 3 vorzugsweise kleiner als 2 Gew.-% aufweist.
- Implantat nach einem der Ansprüche 1 bis 17, dadurch gekennzeichnet, dass die Druckfestigkeit des keramischen Werkstoffs 400 - 600 MPa beträgt.
- Implantat nach Anspruch 18, dadurch gekennzeichnet, dass die Druckfestigkeit des keramischen Werkstoffs 450 - 550 MPa beträgt.
- Implantat nach einem der Ansprüche 1 bis 19, dadurch gekennzeichnet, dass die Porenweite kleiner als 100 µm ist.
- Implantat nach Anspruch 20, dadurch gekennzeichnet, dass die Porenweite kleiner als 50 µm ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/254,206 US6503279B1 (en) | 1996-09-04 | 1996-09-04 | Intervertebral implant |
PCT/CH1996/000303 WO1998009586A1 (de) | 1996-09-04 | 1996-09-04 | Zwischenwirbel-implantat |
US10/337,267 US6843805B2 (en) | 1996-09-04 | 2003-01-07 | Intervertebral implant |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0927011A1 EP0927011A1 (de) | 1999-07-07 |
EP0927011B1 true EP0927011B1 (de) | 2003-01-22 |
Family
ID=27178668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96927498A Expired - Lifetime EP0927011B1 (de) | 1996-09-04 | 1996-09-04 | Zwischenwirbel-implantat |
Country Status (6)
Country | Link |
---|---|
US (2) | US6503279B1 (de) |
EP (1) | EP0927011B1 (de) |
JP (1) | JP2000517221A (de) |
AT (1) | ATE231370T1 (de) |
DE (1) | DE59610079D1 (de) |
WO (1) | WO1998009586A1 (de) |
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-
1996
- 1996-09-04 US US09/254,206 patent/US6503279B1/en not_active Expired - Lifetime
- 1996-09-04 JP JP10512080A patent/JP2000517221A/ja not_active Ceased
- 1996-09-04 AT AT96927498T patent/ATE231370T1/de not_active IP Right Cessation
- 1996-09-04 WO PCT/CH1996/000303 patent/WO1998009586A1/de active IP Right Grant
- 1996-09-04 DE DE59610079T patent/DE59610079D1/de not_active Expired - Lifetime
- 1996-09-04 EP EP96927498A patent/EP0927011B1/de not_active Expired - Lifetime
-
2003
- 2003-01-07 US US10/337,267 patent/US6843805B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US20030114932A1 (en) | 2003-06-19 |
US6843805B2 (en) | 2005-01-18 |
ATE231370T1 (de) | 2003-02-15 |
US6503279B1 (en) | 2003-01-07 |
WO1998009586A1 (de) | 1998-03-12 |
DE59610079D1 (de) | 2003-02-27 |
EP0927011A1 (de) | 1999-07-07 |
JP2000517221A (ja) | 2000-12-26 |
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